A seller wants proof of funds before I go under contract and my buyer won't release his until he sees the property.

The seller's POF request applies to the contracting party, which is you, not your end buyer.

The post above explains the mechanic well, so I'll add the piece a beginner might miss when reading it.

When you go under contract as the wholesaler, you are the buyer on paper. The seller's proof of funds (POF) request is asking whether you can close, because to them, you are the person closing. Your end buyer is invisible at that stage. So the cleanest position is one where you genuinely have something to show: a bank statement, a line of credit, or a transactional funding commitment letter from a lender.

Transactional funding is worth knowing about if you haven't heard the term. It is short-term lending, sometimes just 24 to 48 hours, where a lender agrees to wire funds specifically so you can close a back-to-back transaction. Some of those lenders will issue a commitment letter before the deal is locked up, which gives you a real letterheaded document without you needing $200,000 sitting in a checking account. You pay a fee, often 1 to 3 percent of the purchase price, and the lender is repaid the same day from your buyer's funds.

That letter is what you show the seller's agent. Your buyer's financials stay entirely inside the assignment agreement, which comes later. The two documents never need to be in the same room at the same time.

I'm not certain every listing agent accepts a transactional funding letter in place of a bank statement. That is worth asking the agent directly before you commit to that approach, because some agents have a specific format in mind.

One thing I'd confirm with a real estate attorney in your state: whether your assignment process needs any specific language given local wholesaling rules.

What is the purchase price the seller is asking, and do you have any liquidity of your own to work with right now?

The thread has already answered its own mechanics well. The assumption doing the most work is that the seller's agent will accept POF from the contracting entity rather than the ultimate funding source. Most agents will, because their obligation is to the seller and the seller's concern is deal certainty, not whose name is on the final wire. That framing holds until you get a listing agent who understands assignment and specifically asks for the end buyer's funds. That happens more often on MLS-listed properties where the agent has seen assignments fall apart before.

The risk you did not name is the time gap. Even if the seller accepts your POF at contract execution, many purchase agreements require the buyer to reconfirm funds or provide updated documentation before the inspection period closes. If that clause exists and your buyer still won't produce anything by that date, the seller has a clean exit and you lose the deal on a technicality rather than at the POF stage.

On the lender letter route: the mechanism is sound, but the letter has to reference the contracting entity, which is you, or the gap is visible immediately. A letter addressed to your buyer's LLC that you hand to a seller's agent creates more questions than it answers. Confirm with whichever lending professional issues it that the entity named matches your contract exactly.

One structural option worth examining is a transactional lender who issues a POF based on the deal rather than your personal liquidity. The cost comes out of the spread, so it only pencils if the spread supports it. Check current transactional lending terms directly with providers in your market, they vary.

What does the purchase agreement actually say about buyer documentation obligations between execution and closing?